{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,18]],"date-time":"2025-12-18T08:45:46Z","timestamp":1766047546282,"version":"build-2065373602"},"reference-count":30,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2024,5,28]],"date-time":"2024-05-28T00:00:00Z","timestamp":1716854400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Prosthodontics"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>This study compared the fracture strength of single lithium disilicate implant\u2010supported crowns fabricated on two\u2010piece abutments with various materials: ceramic\u2010reinforced PEEK, zirconia, and lithium disilicate.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>Thirty\u2010six implants were embedded in acrylic cylinders. A two\u2010piece abutment and a crown were designed following a pre\u2010operation scan for a maxillary left central incisor. The designed crown was used to fabricate 36 lithium disilicate crowns. The designed abutment was used to manufacture 36 abutments from 3 materials, 12 each: (A) zirconia; (B) lithium disilicate; and (C) ceramic\u2010reinforced PEEK. Abutments were surface treated and bonded on the titanium base abutments with resin cement. Then, lithium disilicate crowns were bonded on the assigned abutments. Specimens were then subjected to dynamic loading for 1,200,000 cycles. The fracture strength (N) of the assembly was assessed using a universal testing machine. One\u2010way ANOVA followed by multiple comparison tests was used to evaluate the effect of abutment material on the fracture strength of single implant\u2010supported restorations at a significance of .05.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The average fracture strength for the groups with zirconia, PEEK, and lithium disilicate two\u2010piece abutments were 1362N \u00b1 218N, 1235N \u00b1 115N, and 1472N \u00b1 171N, respectively. There was a significant (\n                      <jats:italic>p<\/jats:italic>\n                      &lt; 0.05) difference in fracture strength among the groups. The lithium disilicate group had significantly higher fracture strength (\n                      <jats:italic>p<\/jats:italic>\n                      = 0.0058) than the group with PEEK; however, there was no significant (\n                      <jats:italic>p<\/jats:italic>\n                      &gt; 0.05) difference between the other groups.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Two\u2010piece abutments restored with lithium disilicate crowns investigated in the study have the potential to withstand the average physiological occlusal forces in the anterior region.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jopr.13871","type":"journal-article","created":{"date-parts":[[2024,5,28]],"date-time":"2024-05-28T23:38:59Z","timestamp":1716939539000},"page":"845-851","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Fracture resistance of cement\u2010retained lithium disilicate implant\u2010supported crowns: Effect of material used for two\u2010piece abutments"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-2125-4357","authenticated-orcid":false,"given":"Jekita","family":"Kaenploy","sequence":"first","affiliation":[{"name":"Department of Restorative Sciences College of Dentistry, University of Oklahoma Oklahoma City Oklahoma USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7788-7664","authenticated-orcid":false,"given":"Rui","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry School of Dental Medicine University at Buffalo Buffalo New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0490-8924","authenticated-orcid":false,"given":"Steven","family":"Makowka","sequence":"additional","affiliation":[{"name":"School of Dental Medicine University at Buffalo Buffalo New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4874-583X","authenticated-orcid":false,"given":"Ramtin","family":"Sadid\u2010Zadeh","sequence":"additional","affiliation":[{"name":"Department of Restorative Sciences School of Dentistry University of Alabama at Birmingham Birmingham Alabama USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,5,28]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/sj.bdj.4814157"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/prd.12168"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.11607\/prd.3913"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijom.2011.04.007"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.2186\/jpr.JPR_D_20_00142"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prosdent.2022.01.006"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dental.2012.08.008"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.2772"},{"key":"e_1_2_7_10_1","article-title":"Polyetheretherketone computer\u2010aided design and computer\u2010aided manufacturing framework for All\u2010on\u2010Four mandibular full\u2010arch prosthesis: 3 years' retrospective study of peri\u2010implant soft tissue changes and ridge base relationship","author":"Mourad KE","year":"2022","journal-title":"J. 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